82-83 was the peak of hobbyist computing where articles and ads were in-between components and software.

As the tech improved, it moved into "appliance" mode of being a box you plug in, not a heathkit you assemble. By 86, Gateway and Dell and other packagers sold the "box". As demand shifted, all the mags shrunk from phone-book proportions (PC Mag, Compute, SoftDisk, etc etc). Some survived longer as business software fought for the office and marketing moved to peripherals (mice, monitors, printers) but things got anemic by the 90s.